Chemicals
| Tue 29 Sep 2026
Beijing, Sept. 28 -- Shaanxi Yanchang Petroleum Group has secured a patent on Closed Unloading Device for Catalytic Cracking Waste Catalyst. Ni Xiaobin, Liu Xiping, Gao Wei, Bai Xiaotao, Wei Jinrong, Zhang Feng, He Bin, Zhang Baotong, Ji Guanghua, Bai Pengcheng, Zhang Hao and Ren Wanhong developed the invention.
The patent ap..